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Max RWKW from R33 GTS-T stock internals?

JAPCAB

By JAPCAB,
in Engines & Forced Induction

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jager Community Regular

jager

Posted
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am doing a rebuiild in the next 2 months

apart from fixing the prob i have all the upgrades im looking at doing is forge piston, as the internal of the engine can easily handle 300rwkw no probs at a safe limit, so this is fine for me as i don't want more 250rwkw

shuey

japsky33 Enthusiast

japsky33

Posted
Posted

Hahahaha how can you not want more then 250 ? You so DO!! look at the look on your look. Its a I want 300+kw

am doing a rebuiild in the next 2 months

apart from fixing the prob i have all the upgrades im looking at doing is forge piston, as the internal of the engine can easily handle 300rwkw no probs at a safe limit, so this is fine for  me as i don't want more 250rwkw

shuey

BBQ Community Regular

BBQ

Posted
Posted

We have had 2 Rb25dets, with just stockish mods blow ring lands on pistons and melt number 6 pistons, At around 190 - 200rwkw mark, So pushing any more then that with defiantly reduce the reliability of the motor and it will only be a matter of time until you blow the ring lands, as they are the weakest point on the rb25 motor.

I personally would save up some $ instead of modding it now.... and do the pistons and even by a set of GTR rods for insurance, and then blot on your turbo, injectors, computer, other wise it become very expensive when you do blow your ring lands and score your bore, damage your valves, and so on. Your maching bill goes up very quickly.

Cubes Grand Master

Cubes

Posted
Posted

BBQ.

If you have had 2 motors pop ringlands at 190-200rwkw then I would seriously look at why they broke.

Obviously either the tuner is pumping too much ign. timing in at peak torque + running the AFR's on the edge or there is a injector or fuel pump problem.

JAPCAB Proficient

JAPCAB

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Thanks for the replies guys! Some excellent info here

Hrmm well i guess i'm aiming for the 250rwkw mark - with a good tune it should be ok. I'd love to mess around with the internals and forge em but I haven't quite cracked the $18 mil Powerball yet! hehe. I guess 250-300rwkw out of the stock internals is pretty good considering how many RWKW these cars push out stock ( to the best of my knowledge its about 140-150ish?)

JAPCAB Proficient

JAPCAB

Posted
  • Author
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I think it really depends on the health of the motor before you even started modding it.

Some people will have a motor in better condition than others.

This is a very good point - what tests are best to determine engine health before i start thumping on more mods? compression test?

Sydneykid Grand Master

Sydneykid

Posted
Posted
This is a very good point - what tests are best to determine engine health before i start thumping on more mods? compression test?
Leak down test would be my first choice, then have the oil tested for contaminents.:(
N I B Grand Master

N I B

Posted
Posted

We have a DR30 with a stock RB25 with twin 25/30 HKS turbos that is a full time Barbagallo race car that has made 400rwhp for 3 years on pump BP fuel and does 63 sec laps before the track resurface still runs fine so it is possible.

Car is Gary stewert and the driver is Rob marcon and the car is well knowen and a championship winner.

BBQ Community Regular

BBQ

Posted
Posted
BBQ.

 

If you have had 2 motors pop ringlands at 190-200rwkw then I would seriously look at why they broke.

 

Obviously either the tuner is pumping too much ign. timing in at peak torque + running the AFR's on the edge or there is a injector or fuel pump problem.

The main reason was because the cars were thrashed pretty hard for about 6 - 8 months, and onces they were up around 100,000km mark they tend to become pretty week in the ring-lands. and just couldn't take it any more.

It was more a less an experiment to see how long and how much we could get out of a stock motor. as we had planned for a fully forged internal re-builds.

Too tell you the real reson why, Is we fitted an AVC-R into the car and had it comming on fully boost by 2500 all the way though to red-line.

And after a few runs at that setup, it just blew the ring lands.

http://www.skylinesaustralia.com/photopost.../sort/1/cat/all Pic of piston here....

race_snooze Grand Master

race_snooze

Posted
Posted

well i wasnt going to relpy to this but i have to now after someone saying they fried 2 skylines at close to 200kw, I am running standard iners and turbo and have been making reliable 200rwkw for well since the car was brought in to aust and prob well before that, all that is different is a remaped standard computer and some normal mods like exaust and crap, and have friends that were running 300rwkw but thats when things get iffie, just be careful of leaning out.

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